Combined regulator and temperature indicator



May 29, 1928. 1,671,934

HY. PRAUD COMBINED REGULATOR AND TEMPERATURE INDICATOR File F 1925 2 Sheets-Sheet 1 May 29, 1928. 1,671,934

H PRAUD COMBINED REGULATOR AND TEMPERATURE INDICATOR Filed Feb. 9, 1925 2 sheets-sheet 2 3 Fly;

Patented May 29,1928.

HENRI PRAUI), or PARIS, rnANcE, ASSIGNOR T AMERICAN RAniAToR Germany, or

NEW YORK, N. Y., coRPo'Ra'rIoN', on NEW JE SEY.v

COMBINED BEGULATORAVNDI T MPERATURE INDICATOR;

Application filed February 9 .1925, Serial Nb. 'Z,858,-andin magnum, is, 1924.

The present invention relates to a: combined regulator and temperature indicating device for boiler use, and chiefly for lowpressure boilers adaptedifor example forth heating ofbuildings.

The said-apparatus comprises a thermostat including-a movable rod which is verti cally disposed and acts at its upper end upon a lever controlling :the register or damper forthe draught of the boiler; above the said thermostat is disposed a temperature indi cator, including a pointer which is mechanlcally connected to the said movable rod operated by the thermostat insuch manner as to turn through angles proportional-to the linear displacementsof the saidrod. v

An important feature ofthe said inven tion consists in provision whereby the temperature indicator is so mounted upon the thermostat as to pivot or rotateupon the vertical axisthereof, andthe indicator dial can thus be always placed parallel to thei'ront face ofthe boiler irrespectively of the direction of the plane of oscillation ofthe regulating lever relatively to the said boiler front. I a

'The appended drawingsshow' by way of example two embodiments of the invention.

Fig. 1 is an elevational View of the apparatus, partly in vertical section. r 1

Fig. 2 is an elevational view of the rear of the temperature indicator, with the cover removed.

Fig. 3 is across sectionof the temperature indicator. s

Fig. 4 is an elevational'view o'fanother embodiment with parts shown in vertical section. i

1 is the I main body element corrugated, expansible collapsible closed at itslower end and sealed at its up per edge or end to the body 1 to form a closed space for a suitable liquid which will ,expand at a determined temperature; 3 is a flange secured to 1. and preterablymade of a soft metal so as-to form atight-joint between the ring 1adapted to be screwed upon the boilerand a tubular body consisting of a cast iron socket supporting the axis of the thermostat; 2' is the capsule which preferablyincludes a;

the said lever and of the'members supported thereby will urge the said inner end against an axis orpin 10 traversing the branches of the said fork;- this weight, which tends to raise the rod :8, is balanced by a. reaction spring11'surrounding the latter rod: and

abutting a shoulder 5* in the socket'5, and a flange or collar 8 'on said rod.- Upon the topof the saids'ocket 5 lS around boss12 7 having an aperture at the centre which is looselytraversed by the top of the rod 8.

The said boss supports the base of the dial temperature indicator 13; a nut 14' presses a flange 13 of the said base upon the boss 12 which is externally screwthreaded to be lever .17 whereof one end engages a slot in, The lever 17 actuates a toothed the nut 16. sector 18 engaging a pinion19 keyed to the axis 2001 the pointer-21; a spring 22 urges engaged by the said'nut- 14.

the said pointer into the zero position; and

the pointer will thus move around the dial throughangles which are proportional to the vertical displacements of 'the thermostat rod 8. f

The temperature indicator is standardized I by'turning the rod 15 by means of aflat portion 23, so that it Willrise or descend in the said nut 16, and the pointer can be thus adjusted to the actual temperature." vAccording to the needs' of the installation the r pivoting plane of the lever- 7 can be varied relatively to the front face 'of the boiler. However the indicator dial can be always brought parallel to the said face by turning the base of the'indicator upon the top of the boss 12, theindicator being then secured in place by the nut-14. i

In a modification which issliown in Fig. 4, therod 8 also traverses an opening in the boss '12, but it extends within the case of the indicator 13 and is in contact at its top with arod 24: comprising a rack 25 and slidv able in two guides ,26secured t'o' the indicator case; the said rack engagesfa pinion 19 whereby the pointer is moved through angles proportional to the movements of the rod 8. To'place the indicator dial parallel to the front face'of the boiler, the base of .UNITED STATES PATENT-OFFICE.

the indicator casing is properly bored in order that it receives and may rotate upon the boss 12; the indicator can then be secured in the desired position by means of the'sci'ews27. In this form otthe appara-- tus, the indicator can be turned about from the fact that the rod '24 rests simply upon the upper end of the rod 8.

In both forms oit'the invention shown and described herein,'it will be noted that the main actuating rod 8 and the part or rod of the indicator engaged thereby are in 1011 gitudinal alinement and loosely engage each other by an-end coutact, so that the indicator body maybe rotatably adjusted relative to the main body without disturbing or changmg. the operative connectlon between the v main rod 8 and the indicator.

Obviously, the control mechanism for the pointer 21 may differ from What is herein represented, in either form of the apparatus, without departing from the principle of the invention. In like; manner, the particular construction of the regulating thermostat,

the connection of the same with the control lever for the register, the shape of the socket, and. the like, may be as desired.

Claims:

1. In a combined regulator and temperature indicating device for boiler use, the combination of a supporting element, a lever fulcrumed on said element and adapted to control thefdraft register of "a boiler, a thermostat supported. by said element, an elemerit operatively connecting said thermostat and said lever, a temperature indicator of the. dial and pointer type mounted rotatably on said supporting element, means for connecting said connecting element and pointer to actuate the latter and permitting rotation of the indicator relative to said supporting element without changing the operative connection between said Connecting ele' mentand the indicator pointer, and means for securing said indicator to said supporting element.

2. 111 a combined regulator andtemperature. indicating device for boiler use, the combmation oi aisupportmg element, a lever fulcrumed. on said'element and adapted to control thedraft register of a boiler, a thermostat supported by said element, a rod operatively connecting said thermostat and said lever, a temperature indicator of the dialand pointer type mounted rotatably on saidsupporting element, a connection between said rod and said pointer to actuate the latter and permitting rotation of said indicatorrelative to said supporting element without changing the operative connection between said rod and indicator pointer, and means for securing said lndicatorjto said supporting element. v

3. In a combined re ulator, and tem oer.-

ature. indicatingfdevice forboiler use, the

combination or a supporting element, a lever fulcrumed on said element and adapted to control the draught register of a boiler, a thermostat supported at the lower portion of said element,'a temperature indicator'of the dial and pointer typesupported rotatably on the upperv portion of said element above said lever, a rod actuated bysaid thermostat and operatively connected to said lever, a rod actuated by said thermostat and operatively connected to said lever, a rod in axial alinement'with said first-named rod and in end contact therewith to transmit motion from said first named rod to said pointer and permitting rotation of said in-' dicator relative to said first-named rod, and means for securing said indicator on said supporting elemen 5. In a combined regulator and temperature indicating device for boiler use,'the combination of a tubular body, a thermostat supported at the lower portion of said body, a vertical rod actuated by said thermostat and extending within said body, a lever fulcrumed on said body and adapted to control a draught register, a connection between said rod and said lever, a temperature inclicatorof the dial and pointer type mounted,

rotatably on the upper portion of said body, a pinion connected'with the indicator pointer, an element movable within the indicator and bearing loosely upon the upper end of said rod, said element and rod being in axial alinement, means for imparting the motion of said element to said pinion and hence to said pointer, an'dineans for securing said indicatorto said body.

6. In a combined regulator and temperature indicating device for boiler use, the combination of a tubular body having'an opening at. its upper end, a thermostat sup ported at the lower portion of said body, a

vertical rodactuated by said thermostat and extending through saidbody and movable in I said opening, a lever tulcrumed on said body and adapted to control a draught register, av connection between said rod and lever, atemperatu're indicator of the "dial and pointer type mounted rotatably on the upper portion of said body to turn on an axis substantially coincident with that of to transmit motion from said first-namedrod to said pointerand permitting rotation of said rod, a rod in axial alinement with said firstnamed rod an in end contact therewith said indicator relative to said first-named rod, and means for securing said indicator I on said'supporting element.

i portion of said body, a vertical rod actuated V by said thermostat and extending through 7. In a combined regulator and temperature indicating device .for boiler use, the combination vof a tubular body having a boss on its upper end through which is an opening, a thermostat supported at the lower said body and movable in said opening, a lever fulcrumed on said body-and adapted to control a draught register, a, connection be-' tween said rod and said lever, a temperature indicator of the dial and pointer type mounted rotatably on saidboss to turn on an axis substantially coincident with that of said rod, a rod in axial alinement with said i first-named rod and in'end contact therewith to transmit motion from said first= named rod to said pointer and permitting In testimony thatI claim the foregoing as my nvention, I have signed my name.

HENRI ,PRAUD. 

